Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6dbb9501ee5194…

MALICIOUS

PDF

83.4 KB Created: 2021-09-02 05:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7d160e5349765d757be28e469df4f66c SHA-1: 819cdc2f35cf7277806cabe419681c0e04141937 SHA-256: 0f6dbb9501ee5194d530dcee2a5266ddb95cd31d33aebeed5d95c77fa7755162
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate it's likely part of a phishing campaign, potentially using embedded scripts to facilitate redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://catamma.ru/uplcv?utm_term=the+seducer+narcissist PDF link annotation
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/xedadepuxobolarod.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/fivepajelof.pdfIn PDF document text
    • https://arerp.kr/data/file///vupilenamutemonu.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b351e641dc---vejupifaj.pdfIn PDF document text
    • http://strandedtattoo.net/file/65430657492.pdfIn PDF document text
    • https://ccskin.com/geektic/files/misike.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161150e2e90eb2---47293842452.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ade79a27693---gapeluj.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/1477453608.pdfIn PDF document text
    • http://halaljones.com/uploads/files/56682744846.pdfIn PDF document text
    • https://eternalbliss.net/file/topes.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/84493469052.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/dkajb75p50lh35srv0g9ppc4b0/rapituda.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b639faed1b1---bogodegawuresiwodowex.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/nunozipunowetebigumaf.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/22639951572.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e938ba5844a---72198343692.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b4a7833ef---sasuliluvomofopofudakib.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc3cef099---velalipozisokejomaloxipe.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/mosimewemametid.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/69685318023.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d7f8c81c4024b89ba2492cf039b1bdd7/pofaviv.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/93669134465.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABC 10364 bytes
SHA-256: 9a2f307be074b538f1f2eefae398c502b26a2886a2a6f8beb69a5d3d63f7ccfd
font_02_sfnt_off00011213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11213 17784 bytes
SHA-256: 83b87c43527a28725eb609a3065a39c483a6a4a64d5e82c7fa0845008b505371

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